Home / 20,675.68-28,534.56-12,180.49

Finding the Fourth Proportional to 20,675.68, 28,534.56 and 12,180.49

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Solution

The fourth proportional to 20,675.68, 28,534.56 and 12,180.49 is: 16,810.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.68 : 28,534.56 = 12,180.49 : x
  2. Step 2: Convert to fraction form
    20,675.68/28,534.56 = 12,180.49/x
  3. Step 3: Cross multiply
    20,675.68x = 28,534.56 × 12,180.49
  4. Step 4: Simplify right side
    20,675.68x = 347,564,922.73
  5. Step 5: Solve for x
    x = 347,564,922.73/20,675.68
  6. Step 6: Final answer
    x = 16,810.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.